The effectiveness of treatment in each drug group will be evaluate by global improvement of signs (nasal mucous edema, ocular hyperemia, nasal secretion) and symptoms (itching eye, tearing,itching nose, itching on the palate) of perennial allergic rhinitis, after 4 weeks of treatment. Symptoms as rhinorrhea, nasal congestion, itching nose, sneezing and itching eye were considered as secondary efficacy endpoint, along with the questionnaire of quality of life SF-36. Safety evaluation data will include report of all adverse events (including type, frequency, instensity, seriousness, severity and action taken related to investigational product) reported by patients, parents or legal responsible, ou observed by Investigator.